Yes, that's the malleefowl, Leipoa ocellata ("spotted egg-leaver"!) It's the only megapode that lives in temperate and semi-arid zones instead of the tropics. It's the size of a large chicken and its nest is up to 5 metres in diameter, and it moves 3 tonnes of soil very day to make sure the eggs are alright.

The Aborigines of western Victoria called it Lowan, and the spirit malleefowl, Neilloan, is represented by the constellation in my avatar.

They are not boring! They are bloodthirsty smart little dinosaurs with the emotional temperature of tyrannosaurs. Even the seed eaters. They fight, cheat and steal all the while pretending to be harmless pretty little innocents.

I saw a bird in the garden today that I didn't recognize. I didn't see it closely enough to know what the beak shape is. It was small, maybe finch-sized. It hat a neon yellow splotch on the top of its head and a neon yellow splotch under its tail. I'm not sure how much of the belly was yellow. The wings, tail and upper body were mottled brown.

Almost all warblers (and many other birds) are promiscuous little buggers who merrily interbreed with species close to them. So you may have seen a myrtle/yellow-rumped warbler X some other warbler with more yellow underneath. Also there are variants of many warbler species.